From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/66960 Path: news.gmane.org!not-for-mail From: reader@newsguy.com Newsgroups: gmane.emacs.gnus.general Subject: Re: sendmail ssl authentication Date: Sat, 17 May 2008 18:46:27 -0500 Organization: Still searching... Message-ID: <8763tc7auk.fsf@newsguy.com> References: <87bq37aba8.fsf@newsguy.com> <874p8y5dxt.fsf@newsguy.com> <87fxsh4z8e.fsf@newsguy.com> <87lk29ntjb.fsf@topper.koldfront.dk> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1211068083 11938 80.91.229.12 (17 May 2008 23:48:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 17 May 2008 23:48:03 +0000 (UTC) To: ding@gnus.org Original-X-From: ding-owner+M15436@lists.math.uh.edu Sun May 18 01:48:40 2008 Return-path: Envelope-to: ding-account@gmane.org Original-Received: from util0.math.uh.edu ([129.7.128.18]) by lo.gmane.org with esmtp (Exim 4.50) id 1JxW8l-0004dq-2S for ding-account@gmane.org; Sun, 18 May 2008 01:48:39 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.math.uh.edu) by util0.math.uh.edu with smtp (Exim 4.63) (envelope-from ) id 1JxW6z-00074G-9m; Sat, 17 May 2008 18:46:49 -0500 Original-Received: from mx2.math.uh.edu ([129.7.128.33]) by util0.math.uh.edu with esmtps (TLSv1:AES256-SHA:256) (Exim 4.63) (envelope-from ) id 1JxW6x-000740-HR for ding@lists.math.uh.edu; Sat, 17 May 2008 18:46:47 -0500 Original-Received: from quimby.gnus.org ([80.91.231.51]) by mx2.math.uh.edu with esmtp (Exim 4.67) (envelope-from ) id 1JxW6r-00017z-TN for ding@lists.math.uh.edu; Sat, 17 May 2008 18:46:47 -0500 Original-Received: from main.gmane.org ([80.91.229.2] helo=ciao.gmane.org) by quimby.gnus.org with esmtp (Exim 3.35 #1 (Debian)) id 1JxW75-0005Os-00 for ; Sun, 18 May 2008 01:46:55 +0200 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1JxW6l-0002fk-62 for ding@gnus.org; Sat, 17 May 2008 23:46:35 +0000 Original-Received: from c-67-162-73-42.hsd1.il.comcast.net ([67.162.73.42]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 17 May 2008 23:46:35 +0000 Original-Received: from reader by c-67-162-73-42.hsd1.il.comcast.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 17 May 2008 23:46:35 +0000 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 35 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: c-67-162-73-42.hsd1.il.comcast.net User-Agent: Gnus/5.110007 (No Gnus v0.7) Emacs/22.2 (gnu/linux) Cancel-Lock: sha1:9xfvtyeiq49u3cnpP3wFPxWD7qI= X-Spam-Score: -1.6 (-) List-ID: Precedence: bulk Xref: news.gmane.org gmane.emacs.gnus.general:66960 Archived-At: asjo@koldfront.dk (Adam Sjøgren) writes: > On Fri, 16 May 2008 18:15:45 -0500, reader@newsguy.com wrote: > >> Odd, when I do it, which is what led to my posting here, It refuses to >> connect at all: >> reader > telnet smtp.comcast.net 25 >> Trying 76.96.30.117... >> Finally times out and server closes. >> So no EHLO is possible. > >> I wonder if they block their own customers or something..? > > That is quite common these days. Some ISPs even block _all_ port 25 > traffic. Just checking something here... about what is common. David can telnet to my smtp server smtp.comcast.net while I cannot. Comcast.net is my ISP. Then I find if I ssh to a remote machine that is not on comcast ISP I can also telnet that server. So did you mean that it is common for ISPs to block their own users but not users from the internet? What would that do for them. It seems it would more likely help them to do it the other way round or like you said... just block all to port 25. But it turns out there is an smtp server running on port 25 but I cannot get to it, but people on the internet can... On the face of it, it sounds ridiculous, so I don't understand why they would do that.